Deal Calculator
Find the real unit price, compare two package sizes, or calculate your final price after discounts and coupons. No guessing—just the math.
What does the package cost?
Enter the shelf price before tax.
How much is in the package?
Use the number printed on the package.
Example: If the bag says 28 oz, enter 28 and choose ounces (oz).
Which one is actually cheaper?
Enter both options. We’ll convert compatible units automatically, so you can compare ounces to pounds or liters to gallons.
What will I really pay?
Add the deal pieces you actually have. Leave anything that doesn’t apply blank or at zero.
Optional: calculate price per ounce/count too
We calculate percentage discounts first, then subtract your dollar coupon and rebate. Results are estimates before tax.
How to compare prices the easy way
A bigger package is not automatically the better deal. The easiest way to compare different sizes is to calculate the unit price—the cost for one ounce, pound, item, roll, pod, serving, or other unit. DealDrop HQ’s calculator does that math for you and can also normalize compatible measurements such as ounces and pounds.
Price per ounce
Divide the total price by the number of ounces. A $4.64 package containing 28 ounces costs about 16.6¢ per ounce.
Compare package sizes
Enter two prices and sizes. The calculator converts compatible measurements and shows which option costs less for the same amount.
Coupons and BOGO offers
Calculate the effective price after percentage discounts, dollar coupons, rebates, and free-item promotions so you can see the true cost.
Frequently asked questions
How do I calculate price per ounce?
Divide the total package price by the number of ounces in the package. This tool performs the calculation automatically and shows both dollars and cents per ounce.
Can I compare ounces to pounds?
Yes. The comparison calculator converts weight units such as ounces, pounds, grams, and kilograms to the same base measurement before comparing them.
Can I compare gallons to fluid ounces or liters?
Yes. Compatible volume measurements including fluid ounces, gallons, milliliters, and liters are converted automatically.
Does the calculator know whether a product is a good deal?
This calculator does not guess market prices. It tells you the mathematical unit cost and which of two offers is cheaper based on the information you enter.
Note: Results are mathematical estimates based on the numbers you enter. Retailer coupon rules, taxes, deposits, limits, membership requirements, and promotion terms can affect the final checkout price.